<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        {{msg}}<br>
        <span v-html="msg"></span>
        <br>
        <span v-text="msg"></span>
    </div>

</body>

<script src="../node_modules/vue/dist/vue.js"></script>

    <script>
        let vm =  new Vue({
            el: "#app",
            data: {
                msg:"<h1>你好<h1>"        
            }
        });

        
        
    </script>

</html>